Mobile terminal and control method therefor

1. A mobile terminal comprising: a wireless communication unit; a touch screen including a fingerprint recognition sensor; and a controller configured to: cause the touch screen to display a virtual home button at once at one area of the touch screen based on a direct touch received at the one area; perform fingerprint authentication on a fingerprint of a finger used to apply the direct touch via the fingerprint recognition sensor of the touch screen when the direct touch is maintained at the one area after the virtual home button is displayed such that the direct touch is subsequently applied to the virtual home button; perform a payment related operation when a signal related to payment is received via the wireless communication unit while the fingerprint authentication is performed; and perform an operation not related to payment when no signal related to payment is received while the fingerprint authentication is performed.

2. The mobile terminal of claim 1 , wherein: performing the payment related operation comprises causing the wireless communication unit to transmit predetermined payment means information to a Point of Sale (POS) terminal transmitting the signal related to payment; and the performing the operation not related to payment comprises causing the touch screen to display a home screen page.

3. The mobile terminal of claim 1 , wherein: the virtual home button is circular and associated with at least one of a home screen page output function, a fingerprint recognition function, or a payment related function; and the signal related to payment comprises a signal received from a Point of Sale (POS) terminal capable of performing wireless communication with the wireless communication unit.

4. The mobile terminal of claim 1 , wherein the controller is further configured to: switch the touch screen from an inactive state to an active state and cause the touch screen to display the virtual home button in response to the direct touch, the direct touch received while the touch screen is in the inactive state; perform another fingerprint authentication in response to a first type of touch received on the virtual home button to perform a first operation; and perform a second operation in response to a second type of touch received on the virtual home button, wherein the another fingerprint authentication is not performed in response to the second type of touch.

5. The mobile terminal of claim 4 , wherein the first operation in response to the first type of touch is a payment related function that is performed when the fingerprint is successfully authenticated.

6. The mobile terminal of claim 4 , wherein the controller is further configured to cause the touch screen to display a home screen page when the second operation is performed.

7. The mobile terminal of claim 6 , wherein: the first type of touch is a long touch in which a touch is maintained on the virtual home button at least for a reference time; and the second type of touch is a short touch in which a touch is applied on the virtual home button for less than the reference time.

8. The mobile terminal of claim 5 , wherein performing the first operation comprises: causing the wireless communication unit to transmit predetermined payment means information to a Point of Sale (POS) terminal transmitting a signal related to payment to perform the payment related function in response to the first type of touch; and causing the touch screen to display an image related to the payment means information when the signal related to payment is not received while the fingerprint authentication is performed.

9. The mobile terminal of claim 8 , wherein the controller is further configured to cause the wireless communication unit to transmit the payment means information associated with the image to the POS terminal when the mobile terminal enters a space that allows the wireless communication unit to communicate with the POS terminal, wherein the mobile terminal enters the space while the image related to the payment means information is displayed via the touch screen.

10. The mobile terminal of claim 1 , wherein the controller is further configured to cause the touch screen to display the virtual home button when pressure of the direct touch applied to the one area on the touch screen is equal to or greater than a reference pressure such that the virtual home button is not displayed when the pressure is less than the reference pressure.

11. The mobile terminal of claim 1 , wherein the controller is further configured to cause the mobile terminal to vibrate when the virtual home button is displayed via the touch screen in response to the direct touch received at the one area of the touch screen.

12. The mobile terminal of claim 1 , wherein the controller is further configured to cause the touch screen to continue displaying the virtual home button based on whether the signal related to payment is received via the wireless communication unit.

13. The mobile terminal of claim 12 , wherein the controller is further configured to cause the touch screen to: display the virtual home button at the one area of the touch screen when the signal is received while the direct touch is maintained at the one area or at the virtual home button; and display the virtual home button at a predetermined position of the touch screen when the signal is received while the direct touch is no longer maintained at the one area of the touch screen.

14. The mobile terminal of claim 13 , wherein the predetermined position is determined by user setting or the predetermined position corresponds to an area of the touch screen where the virtual home button has been previously displayed.

15. The mobile terminal of claim 12 , wherein the controller is further configured to: cause the touch screen to display an image related to payment means information in addition to the virtual home button in response to the signal related to payment; and cause the wireless communication unit to transmit the payment means information associated with the image to a Point of Sale (POS) terminal transmitting the signal related to payment when the fingerprint is authenticated.

16. The mobile terminal of claim 1 , wherein the controller is further configured to cause the touch screen to display different screen information based on whether or not the fingerprint is authenticated successfully such that a first image is displayed when the fingerprint is authenticated successfully and a second image is displayed when the fingerprint authentication fails.

17. The mobile terminal of claim 1 , wherein: the direct touch received at the one area of the touch screen prior to the displaying of the virtual home button is a first touch; the fingerprint authentication is not performed until the virtual home button is displayed in response to the first touch; a second touch is received on the virtual home button following the first touch when the virtual home button is displayed, and the second touch is maintained on the virtual home button after the fingerprint is successfully authenticated; and the controller is further configured to cause the touch screen to display different screen information according to a type of the second touch.

18. The mobile terminal of claim 17 , wherein: a home screen page is displayed via the touch screen when the second touch is a long touch maintained for at least a reference time on the virtual home button; and at least one graphic object associated with a payment related function is displayed based on a location of the virtual home button when the second touch is a drag touch starting from the virtual home button.

19. The mobile terminal of claim 1 , wherein the controller is further configured to: cause the touch screen to display first payment card information distinguishably from the virtual home button when the fingerprint is authenticated successfully, wherein the virtual home button, which has been displayed prior to displaying the first payment card information, is continuously displayed when the first payment card information is displayed; and cause the touch screen to display second payment card information instead of the first payment card information when a first drag touch is received via the virtual home button while the first payment card information is displayed.

20. The mobile terminal of claim 19 , wherein: the controller is further configured to cause the touch screen to display a menu associated with the first payment card information when a second drag touch is received via the virtual home button while the first payment card information is displayed, the second drag touch received in a second direction that is different from a first direction of the first drag touch; and the first direction and the second direction are perpendicular to each other.